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Title: Unitary limit in crossed Andreev transport

One of the most promising approaches for generating spin- and energy-entangled electron pairs is splitting a Cooper pair into the metal through spatially separated terminals. Utilizing hybrid systems with the energy-dependent barriers at the superconductor/normal metal (NS) interfaces, one can achieve a practically 100% efficiency outcome of entangled electrons. We investigate a minimalistic one-dimensional model comprising a superconductor and two metallic leads and derive an expression for an electron-to-hole transmission probability as a measure of splitting efficiency. We find the conditions for achieving 100% efficiency and present analytical results for the differential conductance and differential noise.
Authors:
 [1] ;  [2] ;  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Russian Academy of Sciences (RAS), Chernogolovka (Russian Federation). Landau Inst. for Theoretical Physics
Publication Date:
Grant/Contract Number:
AC02-06CH11357; 14-02-01287
Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 17; Journal Issue: 10; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Russian Academy of Sciences (RAS), Chernogolovka (Russian Federation)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); Russian Foundation for Basic Research (RFBR) (Russian Federation)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; crossed Andreev reflection; quantum entanglement; superconductivity; Cooper pair splitting; hybrid system; Bogoliubov quasiparticles; entangler
OSTI Identifier:
1239018
Alternate Identifier(s):
OSTI ID: 1239020; OSTI ID: 1356625